Apparatus for step-rolling tubes.



No. 683,80l. Patented Oct. I, I901. J. BEJMAN.

APPARATUS FOR STEP ROLLING TUBES.

(Application Bled July 8, 1901. (No Model.)

M fur u l u WW I n Venibr UNITED STATES PATENT OFFICE.

JAQUES REIMAN, OF PLAS MARL, NEAR SWANSEA, ENGLAND, ASSIGNOR TO THE BRITISH MANNESMANN TUBE 00., LIMITED, OF LANDORE, R. S. 0., ENGLAND.

APPARATUS FOR STEP-ROLLING TUBES.

SPECIFICATION forming part of Letters Patent No. 683,801, dated October 1, 1901- Application filed July 8, 1901. Serial No. 67,407. (No model.)

T at whom it may concern: catch levers is, engaging shoulders near the 50 Be it known that I, J AoUEs REIMAN, tubeend of the mandrel. mill foreman, a citizen of the Swiss Republic, a is the stop which fits on a sliding tube 1; residing at Plas Marl, near Swansea, Engand bears against a gland b, behind which is 5 land, have invented certain new and useful a buffer-spring d,withina socket c,carried on Improvements in Apparatus for Step-Rolling a plate f, secured to the housings of the rolls. 5 5 Tubes, (for which I have applied for a patent When the blank is pushed forward, as will in Great Britain, No. 753, dated January 11, be presently described, its end, or when it 1901,) of which the following is a specificahas been partly operated on the rounded tion. shoulder a left by the last action of the rolls,

WVhen tubes are rolled step by step by strikes against the front end of the stop a, means of eccentric or gap rollers, the blank pushing it back against the buffer-spring d, on which the rollers are to operate is placed which takes 0E the shock of the blow and re= on a mandrel and pushed forward by a spring stores the stop to its former position. The

'15 through the gap of the rollers up against tube 11 is screw-threaded at its end and is an adjustable stop. Then as the rollers provided with adjusting-nuts e, by which the revolve their prominent parts act on the tube 12 and stop a can be pushed more or less blank, reducing the diameter and increasing to the right by the spring d. In this way the length of part of it until the gap of the the extent of the blank operated on at each 20 rollers allows the spring to again push it forrevolution of the rolls can be varied, the

ward, the reduced part passing through a hole greater being the length operated on the farof the stop until the shoulder formed by the ther the stop a is adjusted to the left. rolling meets the stop. Further, when the The socket 'n, in which the mandrel h is rollers are acting on the last part of the blank held, is itself attached to the end of a rod 19,

2 5 they meet the socket which holds the manwhich can slide in eyes on the feed-carriage drel, pushing it back. In both cases-that is g and is urged to the left by a spring 3. The to say, when the blank is pushed against the feedcarriage has four wheels running on stop and when the rollers meet the socket rails, and the axle of its front wheels has there is considerable shock, to deaden which pinions gearing with stationary racks. On

o buffer-springs are provided according to this the front axle there are fixed hand-wheels t,

invention, the buifer-springin thesocketalso by turning which, thus turning the pinions, allowing the back-pressing action of the rollthe carriage can be advanced or retracted, or ers to effect release of the mandrel from the by holding these hand-wheels the carriage socket when the extreme end of the blank is can be kept stationary. When the carriage 3 5 being rolled down, so that on the rolling of is advanced until the end or shoulder of the the tube being completed it, along with the blank meets the stop a, then the carriage is mandrel, can be withdrawn. Ishall describe held while the rollers make a revolution, the stop and socket with their buffer-springs thereby elongating the blank and pushing it and with the release-gear of the mandrel, and the mandrel back toward the right in op- 40 referring to the accompanying drawings. position to the spring 8, which when the roll- Figure l is a vertical section of the rolls, ers present their gap to the blank pushes it stop, and socket with the feed-carriage shown again toward the left. \Vhen the rollers in elevation; and Fig. 2 is a plan, partly seccome to act on the last part of the blank, they tional, of the same parts. encounter a collar a on the end of a tube Z,

5 r r are the gap rolls, which revolve in the which is inclosed in another tube g, fitted to direction of the arrow acting on the blank j, slide in the socket 'n. This tube has a shoul- 5 which is shown partly reduced and elongated der bearing against a ring m, which bears in its front part, being carried on the mandrel against one end of a spring to, inclosed withh, whichis held in the socket n by two springin the socket a, when the prominent parts of the rolls meet the collar u and push it back in opposition to the spring 20, which yields to the shock. At the same time the end of the tube g, which has an inclined edge, acts on the left arms of the levers is, causing their right arms to open away from the shoulders of the mandrel, which is thus left free and is by the last part of the elongating action of the rolls upon the blank caused to move to the left free from the lever 75, so that afterward it can be withdrawn, along with the rolled tube, through the stop a.

Having thus described the nature of thisinvention and the best means I know of carrying the same into practical efiect, I claim 1. In an apparatus for step-rolling tubes with fixed socket c, the combination of the nesses.

JAQUES REIMAN. Witnesses:

H. ROBINSON, W. J. WILLIAMS. 

